Unveiling the Bronsted acid mechanism for Meerwein-Ponndorf-Verley reduction in methanol conversion over ZSM-5.

ABSTRACT: The conversion of methanol over zeolites offers a sustainable alternative for fuels and chemicals production. However, a complete understanding of the competing reaction pathways, particularly those leading to C-C bond formation, remains elusive. This work presents a novel mechanism for selective methanol conversion in ZSM-5 zeolites, involving a Brønsted acid site (BAS)-mediated Meerwein-Ponndorf-Verley (MPV) reduction pathway. Employing a multidimensional solid-state NMR spectroscopy combined with isotopic labeling and theoretical calculations, we identify this pathway for acetaldehyde reduction with methanol, directly contributing to ethene formation. This mechanism, involving carbenium ion intermediates like 1-hydroxyethane or 1-methoxyethane ions, contrasts with the well-established L

SUBMITTER: Cai W 

PROVIDER: S-EPMC11464788 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature